<template>
  <view class="cart-container" v-if="cart.length !== 0">
    <!-- 收货地址区 -->
    <my-address></my-address>
    
    <!-- 商品列表的标题区域 -->
    <view class="cart-title">
      <uni-icons type="shop" size="18"></uni-icons>
      <text class="cart-title-text">购物车</text>
    </view>
    
    <!-- 循环渲染商品信息 -->
    <uni-swipe-action>
      <block v-for="goods in cart" :key="goods.goods_id">
        <uni-swipe-action-item 
          :right-options="options" 
          @click="swipeItemClickHandler(goods)"
        >
          <my-goods 
            :goods="goods" 
            :showRadio="true" 
            @radio-change="radioChangeHandler"
            @num-change="numberChangeHandler"
          ></my-goods>    
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    
    <!-- 总价格 -->
    <my-settle></my-settle>
  </view>
  
  <!-- 当购物车没有商品时显示 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
  import { mapState, mapMutations } from 'vuex'
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins: [badgeMix],
    computed: {
      ...mapState('moduleCart', ['cart'])
    },
    data() {
      return {
        options: [{
          text: '删除',
          style: {
            backgroundColor: '#C00000'
          }
        }]
      };
    },
    methods: {
      ...mapMutations('moduleCart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
      radioChangeHandler(value) {
        this.updateGoodsState(value)
      },
      numberChangeHandler(value) {
        this.updateGoodsCount(value)
      },
      // 删除购物车的商品
      swipeItemClickHandler(goods) {
        this.removeGoodsById(goods.goods_id)
      }
    },

  }
</script>

<style lang="scss">
.cart-container {
  padding-bottom: 50px;
}

.cart-title {
  height: 40px;
  display: flex;
  align-items: center;
  padding-left: 5px;
  border-bottom: 1px solid #efefef;
  .cart-title-text {
    font-size: 14px;
    margin-left: 10px;
  }
}

.empty-cart {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  .empty-img {
    width: 100px;
    height: 100px;
    margin-top: 25%;
  }
  .tip-text{
    font-size: 14px;
    color: gray;
    margin-top: 15px;
  }
}
</style>
